Have an 18 month old Frigidaire built Kenmore, model 587.15269900. The complaint is very poor cleaning, said it's been that way since it was new. I ran the dishwasher and found almost no spray from the lower spray and very weak spray from the upper spray arms. What is wrong with this dishwasher?

Ding, ding, ding, ding, we have a winner! The check ball was missing. According to the tenant, it's never worked right since it was new. Two "technicians" looked at it under warranty. The first one said nothing was wrong, the second one said he fixed it. I knew what was wrong before I even pulled a tool from my bag.

I've a got another stumper, if anyone wants to try. It's about a 10 year old GE dishwasher. Don't know the model number but it's a bottom of the line, mechanical timer, plastic tub, round dispenser cover. Complaint is it doesn't clean very well. He also said he's been there three months and rinse aid dispenser is still full, the level hasn't changed. What is wrong?